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Physical science > CH 25 > Flashcards

CH 25 Flashcards

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Biology 101 flashcards
1
Q

(MOR) system system of mountain ranges on the seafloor seperated by valleys

A

mid-ocean ridge

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2
Q

a long, narrow depression

A

rift valley

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3
Q

the boundary where two plates collide

A

convergent plate boundary

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4
Q

the denser plate dives beneath the continent in process

A

subduction

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5
Q

the boundary between two plates that are moving apart

A

divergent plate boundary

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6
Q

this type of boundary where plates slide horizontally past each other in the opposite directions

A

transform plate boundary

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7
Q

is a sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in the earth’s crust called faults

A

earthquake

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8
Q

is a crack in earths crust along which rock has moved

A

fault

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9
Q

this sudden release of strain of energy as rock moves along a fault

A

elastic rebound

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10
Q

the point of origin for an earthquake

A

focus

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11
Q

the point on earths surface directly above focus

A

epicenter

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12
Q

who came up with contentail drift hypothesis

A

Alfred wegener

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13
Q

what are some evidence for the Continental drift

A

1: Alfred wegener observed that the eastern coastline and the south america fit together like a puzzle peace
2: wegener argued that you could match rock types , Fosels

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14
Q

what was the name of the supper continental drift

A

1: Pangaea

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15
Q

who came up with the seafloor spreading hypothesis

A

harry Hess used some sonar to discover three dimensional maps (M O R) was found

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16
Q

how did harry Hess find the seafloor ?

A

he discovered an mid-ocean ridge

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17
Q

where at on the ocean floor were is the newer rock formed

A

closer to the ( M O R ) is where the new rock is formed where magma is continues to form and get bigger and the sea floor spreads and when the magma meets the ocean floor it cools

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18
Q

what are the types of plate bounders

A

divergent boundary
convergent boundary
transform boundary
theere is alos only one transport boundary

19
Q

how do convergent plates move

A

they collide together

20
Q

seduction only happens with type of plate boundary

A
21
Q

what types of crust do we have ?

A
22
Q

what cam be created when two oceanic plates come together

A

volcanic islands

23
Q

how do divergent plate boundaries move

A

they move away from one each other
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24
Q

what is an example of a divergent plate boundaries

A

the (M O R ) “ocean range is one example of a divergent plate boundary
only (oceanic crust )
east African rift (only cont entail crust)

25
Q

how do transform plate boundary’s plates move ?

A

they slide past each other

26
Q

what type of crust is with transform plate boundary’s

A
27
Q

what is a convection currant ?

A

1: magma heats up, becomes less dense,and rises
2: magma cools, becomes more dense, sinks/falls

28
Q

what is an earthquake

A

1: an earthquake is a sudden movement with a crack in the earths surface which is called a fault.

29
Q

which plate boundary’s have shallow earthquakes.

A
  1. divergent

2. transform / these are our shallow

30
Q

which plate boundary’s have the deepest earthquakes

A
  1. convergent plate boundary’s are the deepest earthquake
31
Q

what are the four types of stress are applied to rocks

A
  1. compression when pushed together 2.tension when pulled apart
  2. shear is when is twisting /and torsion stress
32
Q

what are the two types of deformation

A
  1. elastic: when the stress is removed it turns to its original shape
  2. plastic:when stress is removed it remains in the same shape
33
Q

how many types of size mic waves are there ?

A

there are 3 types

1: primary waves
2: secondary
3: surface waves

34
Q

what are the two types of body waves?

A

1: ( p-waves) are known as primary waves
2: secondary waves: can be called (s-waves)

35
Q

what type of wave is a primary wave?

A

1: compression is a primary wave( are also the fadstest

36
Q

what body wave is the fastest?

A

the fastest is primary wave

37
Q

what body wave is the fastest?

A

the fastest is primary wave

38
Q

what type of materials do primary waves travel through?

A
39
Q

what type of material secondary waves travel through?

A

1: they travel through solids

40
Q

what type of waves do the most damage

A

1: surface waves do the most damage because they move up and down and cause the most damage when they move

41
Q

what are the two scales to measure earthquakes

A

1 : the Richter magnitude

2: Mercalli

42
Q

what does the Ricter scale measure

A

the amount of energy realest

43
Q

what does the mercalli scale measure

A

1 the amount of damage is measured by the mercalli scale

Physical science (10 decks)

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